Gerhard Klostermeier
Research Scientist
Germany
Summary
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RockstarGerhard Klostermeier is a Research Scientist and seasoned security-focused engineer with 13 years of experience in embedded systems, NFC/RFID research, and mobile security tooling. Based in Germany, he contributes to well-known open-source projects like Proxmark3 and the MifareClassicTool Android app, where he has improved firmware, protocol implementations, and user-facing NFC functionality. His background blends low-level C firmware fixes and crypto-related protocol work with practical Android UI/UX enhancements, reflecting both hardware and software fluency. A pentester and RF security enthusiast, he is comfortable moving between chip-level debugging and shipping usable tools for the security community. Notably, his contributions reveal attention to both subtle correctness (boolean/indentation fixes in critical firmware) and end-user usability (value block encoder/decoder and menu improvements).
13 years of coding experience
Github Skills (15)
c1710
nfc10
firmware10
embedded10
protocols10
android-sdk10
rfid10
c1110
sys10
android-development10
security9
reverse-engineering9
debug9
user-interface9
github4
Programming languages (14)
Github contributions (5)
ikarus23/MifareClassicTool
Feb 2013 - Oct 2022
An Android NFC app for reading, writing, analyzing, etc. MIFARE Classic RFID tags.
Role in this project:
Mobile Developer (Android)
Mobile Developer (Android)Contributions:8 releases, 7 reviews, 961 commits in 9 years 10 months
Contributions summary:Gerhard primarily focused on implementing features within an Android NFC application for reading, writing, and analyzing MIFARE Classic RFID tags. Their work included modifying activity layouts, handling user input, adding dialogs, and integrating functionalities such as a value block decoder/encoder. They appear to be responsible for improvements to the user interface and interactions, including updates to menu functionalities, text formatting, and various usability enhancements.
analyzingsecurityandroidkotlinrfid
Proxmark/proxmark3
Apr 2014 - Dec 2017
Proxmark 3
Role in this project:Embedded Systems Engineer / IoT Developer
Embedded Systems Engineer / IoT DeveloperContributions:13 commits, 2 PRs, 7 pushes in 3 years 8 months
Contributions summary:Gerhard primarily contributed to bug fixes and code improvements within the Proxmark3 repository, which focuses on RFID and NFC research and development. Their commits demonstrate a focus on low-level embedded systems aspects, including fixing indentation issues, correcting boolean variable handling, and addressing issues in firmware related to security and protocol implementations. Specific changes include modifications in `crapto1.c`, `crypto1.c`, and `hfsnoop.c` files which are crucial to the tool's ability to interface with and analyze various RFID protocols.
makerssd-cardsoftware-defined-radioproxmarkcircuits
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